The Fowler-Bowers XT Analog Bore Gages offer an economic solution to accurate shop floor bore measurement. Fast, accurate and easy-to-use, the wide application range of the XT Analog Bore Gage line may be purchased individually or in sets.

1. BORE GAGES

2. Ultima Bore Gaging System
Featuring Bowers' historic quality and high-accuracy the Ultima Bore Gaging System is
the next generation of Bower's famous Super-Bore line of bore gages and accessories.
Bore Gages
Special features:
• Greater accuracy
• Utilizes Bowers' "FASTFIT" measuring heads
• Setting rings manufactured to DIN Standard 2250 part 2.
• Extended head ranges (above 14mm) for greater flexibility and
cost-effective measurement.
• All 2-6mm sets supplied as standard with depth-stop.
Features:
• Measuring range:.078"-12.3"/2-310mm
• Resolution: .00001"/.0001mm
• Constant spring pressure ensures top repeatability.
• Positive feel when heads self-centre in the bore.
• Fastfit measuring heads for rapid replacement.
• UKAS certificates standard for all measuring heads.
• UKAS certificates standard for all setting rings.
• Ceramic anvils on heads above .472"/12mm
• Blind-bore measurement standard above .472"/12mm
• Possible to connect several probe holders to one single readout to measure different
bore sizes at one measuring station.
• The complete range of Bowers special heads are available for the Ultima (grooves,
threads, splines, deep-bores etc.).
• Depth stops available for all heads.
• Extensions available for deep bore measurement.
Ceramic anvils for
extended life!
Ultima Gaging System
shown with Sylvac
digital display. See the
Display section on page
124 for information.
Contact the Fowler Technical Department for special head applications.
154
F O W L E R H I G H P R E C I S I O N • 1 - 8 0 0 - 7 8 8 - 2 3 5 3 • w w w. f v f o w l e r. c o m

3. "Fastfit"
Heads have
threads
r more
Kits to cove
range
Ultima Bore Gaging System- Individual Heads
Part Number Range
Accuracy
54-565-201
.078"-.098"/2.0-2.5mm
.00004"/.0010mm
54-565-202
.098"-.118"/2.5-3.0mm
.00004"/.0010mm
54-565-203
.118"-.157"/3-4mm
.00004"/.0010mm
54-565-204
.157"-.197"/4-5mm
.00004"/.0010mm
54-565-205
.197"-.236"/5-6mm
.00004"/.0010mm
54-565-206
.236"-.315"/6-8mm
.00004"/.0010mm
54-565-207
.315"-.393"/8-10mm
.00004"/.0010mm
54-565-208
.393"-.472"/10-12mm
.00004"/.0010mm
54-565-209
.472"-.550"/12-14mm
.00004"/.0010mm
54-565-210
.550"-.670"/14-17mm
.00004"/.0010mm
54-565-211
.670"-.787"/17-20mm
.00004"/.0010mm
54-565-212
.787"-.945"/20-24mm
.00004"/.0010mm
54-565-213
.945"-1.1"/24-28mm
.00004"/.0010mm
54-565-214
1.1"-1.26"/28-32mm
.00004"/.0010mm
54-565-215
1.26"-1.5"/32-38mm
.00004"/.0010mm
54-565-216
1.5"-1.73"/38-44mm
.00004"/.0010mm
54-565-217
1.73"-1.97"/44-50mm
.00004"/.0010mm
54-565-218
1.97"-2.36"/50-60mm
.00006"/.0015mm
54-565-219
2.36"-2.756"/60-70mm
.00006"/.0015mm
54-565-220
2.756"-3.15"/70-80mm
.00006"/.0015mm
54-565-221
3.15"-3.543"/80-90mm
.00006"/.0015mm
54-565-222
3.543"-3.94"/90-100mm
.00006"/.0015mm
54-565-223
3.94"-4.33"/100-110mm
.00006"/.0015mm
54-565-224
4.33"-4.725"/110-120mm
.00006"/.0015mm
54-565-225
4.725"-5.12"/120-130mm
.00006"/.0015mm
54-565-226
5.12"-5.51"/130-140mm
.00006"/.0015mm
54-565-227
5.51"-5.9"/140-150mm
.00006"/.0015mm
54-565-228
5.9"-6.3"/150-160mm
.00006"/.0015mm
54-565-229
6.3"-6.69"/160-170mm
.00006"/.0015mm
54-565-230
6.69"-7.09"/170-180mm
.00006"/.0015mm
54-565-231
7.09"-7.48"/180-190mm
.00006"/.0015mm
54-565-232
7.48"-7.875"/190-200mm
.00006"/.0015mm
54-565-233
7.875"-8.27"/200-210mm
.00006"/.0015mm
54-565-234
8.27"-8.661"/210-220mm
.00008"/.0020mm
54-565-235
8.661"-9.055"/220-230mm
.00008"/.0020mm
54-565-236
9.055"-9.449"/230-240mm
.00008"/.0020mm
54-565-237
9.449"-9.842"/240-250mm
.00008"/.0020mm
54-565-238
9.842"-10.236"/250-260mm
.00008"/.0020mm
54-565-239
10.236"-10.63"/260-270mm
.00008"/.0020mm
54-565-240
10.63"-11.024"/270-280mm
.00008"/.0020mm
54-565-241
11.024"-11.417"/280-290mm
.00008"/.0020mm
54-565-242
11.417"-11.811"/290-300mm
.00008"/.0020mm
54-565-243
11.811"-12.2"/300-310mm
.00008"/.0020mm
Measuring
Depth
.35"/9mm
.35"/9mm
.47"/12mm
.71"/18mm
.71"/18mm
2.36"/60mm
2.36"/60mm
2.4"/61mm
2.4"/61mm
2.4"/61mm
2.4"/61mm
2.72"/69mm
2.72"/69mm
2.72"/69mm
2.83"/72mm
2.83"/72mm
2.83"/72mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
3.15"/80mm
Ultima Bore Gaging System - Kits
Part Number Description
54-565-020
.390" - .790"/10-20mm ncludes: handles, rings & heads. Does not include readout
I
54-565-070
.240" - .790"/6-20mm Includes: handles, rings & heads. Does not include readout
54-565-080
.790" - 1.97"/20-50mm Includes: handles, rings & heads. Does not include readout
54-565-090
1.97" - 3.94"/50-100mm Includes: handles, rings & heads. Does not include readout
54-565-100
.790" - 3.94"/20-100mm Includes: handles, rings & heads. Does not include readout
Contact the Fowler Technical Department for special head applications.
Specifications subject to change without notice.
155
Bore Gages
Ultima Bore Gaging System

4. Bore Gages
Ultima Bore Gaging System
Ultima Bore Gaging System- Rings: XX Class
Order No.
Size
Order No
54-565-401
.098"/2.5mm
54-565-412
54-565-402
.157"/4mm
54-565-413
54-565-403
.197"/5mm
54-565-414
54-565-404
.315"/8mm
54-565-415
54-565-405
.472"/12mm
54-565-416
54-565-406
.670"/17mm
54-565-417
54-565-407
.945"/24mm
54-565-418
54-565-408
1.26"/32mm
54-565-419
54-565-409
1.73"/44mm
54-565-420
54-565-410
2.36"/60mm
54-565-421
54-565-411
3.15"/80mm
54-565-422
Transducer Handle
Order No.
54-565-525
54-565-526
54-565-527
54-565-528
Description
PH2 holder
PH3 holder
PH4 holder
PH5 holder
Size
3.94"/100mm
4.725"/120mm
5.51"/140mm
6.3"/160mm
7.09"/180mm
7.875"/200mm
8.661"/220mm
9.449"/240mm
10.236"/260mm
11.024"/280mm
11.811"/300mm
Range
.078"-.236"/2-6mm
.236"-.787"/6-20mm
.787"-3.94"/20-100mm
3.94"-12.2"/100-310mm
Ultima Standard Extensions
Order No.
Length
54-565-601
2.48"/63mm
54-565-602
2.952"/75mm
54-565-603
3.937"/100mm
54-565-604
5.905"/150mm
54-565-605
5.905"/150mm
Range
.236"-.393"/6-10mm
.393"-.472"/10-12mm
.472"-.787"/12-20mm
.787"-1.97"/20-50mm
1.97"/50mm and up
Ultima Short Extensions
Order No.
Length
54-565-606
1.97"/50mm
54-565-607
1.97"/50mm
Range
.787"-1.97"/20-50mm
1.97"/50mm and up
Available Readouts
Order No.
54-618-300
54-618-148
54-618-148-1
156
Description
Sylvac D-300S Digital Display
Sylvac D-50S Digital Display
Sylvac D-50S Pro Digital Display
F O W L E R H I G H P R E C I S I O N • 1 - 8 0 0 - 7 8 8 - 2 3 5 3 • w w w. f v f o w l e r. c o m

5. Bore Gages
XT Bore Gaging System
The XT Series Bore Gages from Bowers, the world's leading
bore gage manufacturer, combines high accuracy and ease of
use. With the Pistol Grip's constant measuring pressure and
the Holemike's ratchet thimble, anyone can achieve consistent
measurements by eliminating operator feel.
Specifications subject to change without notice.
157

6. XTH Holematic Pistol Grip
Bore Gages
Fowler/Bowers XT Holematic Pistol Grip range
of bore gages offer extended travel with fixed
anvils. The pistol grip handle incorporates
a constant measuring pressure to eliminate
operator "feel."
• Large easy-to-read swivel display
• Self centering heads
• RS-232C output and USB connectivity.
• Three preset memories
• Fixed anvils
• Resolution: .00005" /.001mm
• Range .080"—12" (2—300mm)
• Tungsten carbide measuring faces on all 3-point heads from .5" (12.5mm) and up.
• Heads with special anvils available for threads, splines, slots, etc.
• Sizes over .500" (12.5mm) feature blind bore capability
• Setting rings included in all sets
• Includes UKAS certificates for all pistol grip, heads and rings.
• Special anvils available
Range:
" Standard
0.080" to 12
uring system
astest meas
F
Erganomnic
design
atability
Amazing repe
Electronic Holematic Pistol Grip XTH - Individual sizes (includes pistol grip, head and ring)
Part Number Range
Accuracy
Depth
2-Point Heads
54-566-701
.080"—.100" (2—2.5mm)
.00015" (0.004mm)
.350" (9mm)
54-566-702
.100"—.120" (2.5—3mm)
.00015" (0.004mm)
.350" (9mm)
54-566-703
.120"—.160" (3—4mm)
.00015" (0.004mm)
.470" (12mm)
54-566-704
.160"—.200" (4—5mm)
.00015" (0.004mm)
.700" (18mm)
54-566-705
.200"—.250" (5—6mm)
.00015" (0.004mm)
.700" (18mm)
3-Point Heads
54-566-706
.250"—.312" (6—8mm)
.00015" (0.004mm)
2.28" (58mm)
54-566-708
.312"—.375" (8—10mm)
.00015" (0.004mm)
2.28" (58mm)
54-566-710
.375"—.500" (10—12.5mm)
.00015" (0.004mm)
2.28" (58mm)
54-566-712
.500"—.625" (12.5—16mm)
.00015" (0.004mm)
2.44" (62mm)
54-566-716
.625"—.750" (16—20mm)
.00015" (0.004mm)
2.44" (62mm)
54-566-720
.750"—1" (20—25mm)
.00015" (0.004mm)
2.62" (66mm)
54-566-725
1—1.375" (25—35mm)
.00015" (0.004mm)
2.62" (66mm)
54-566-735
1.375"—2" (35—50mm)
.00015" (0.004mm)
3.15" (80mm)
54-566-740
2—2.625" (50—65mm)
.00020" (0.005mm)
3.15" (80mm)
54-566-745
2.625"—3.250" (65—80mm)
.00020" (0.005mm)
3.15" (80mm)
54-566-750
3.250"—4" (80—100mm)
.00020" (0.005mm)
3.35" (85mm)
54-566-800
4—5" (100—125mm)
.00025" (0.006mm)
3.94" (100mm)
54-566-825
5—6" (125—150mm)
.00025" (0.006mm)
3.94" (100mm)
54-566-850
6—7" (150—175mm)
.00030" (0.007mm)
3.94" (100mm)
54-566-875
7—8" (175—200mm)
.00030" (0.007mm)
3.94" (100mm)
54-566-876
8—9" (200—225mm)
.00030" (0.008mm)
3.94" (100mm)
54-566-877
9—10" (225—250mm)
.00030" (0.008mm)
4.05" (103mm)
54-566-878
10—11" (250—275mm)
.00035" (0.009mm)
4.05" (103mm)
54-566-879
11—12" (275—300mm)
.00035" (0.009mm)
4.05" (103mm)
Contact the Fowler Technical Department for special anvil applications.
158
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7. Complete Range Sets
Part Number
54-566-009
54-566-010
54-566-020
54-566-050
54-566-100
54-566-105
54-566-110
54-566-200
54-566-210
54-566-620
Connectivity Kits
Part Number
54-115-444
54-115-528
54-100-350
Range
.080"—.250" (2—6mm)
.250"—.375" (6—10mm)
.375"—.750" (10—20mm)
.750"—2" (20—50mm)
2—4" (50—100mm)
4—6" (100—150mm)
6—8" (150—200mm)
4—8" (100—200mm)
.750"—4" (20—100mm)
.250"—.750" (6-20mm)
Includes
5 heads, 1 handle, 3 rings
2 heads, 1 handle, 1 ring
3 heads, 1 handle, 2 rings
3 heads, 1 handle, 2 rings
3 heads, 1 handle, 2 rings
2 heads, 1 handle, 1 ring
2 heads, 1 handle, 1 ring
4 heads, 1 handle, 2 rings
6 heads, 1 handle, 4 rings
5 heads, 1 handle, 3 rings
Description
RS232 Power Computer Connect Kit
USB Power Computer Connect Kit
CR2032 Battery
Pistol Grips
Holematic XTH Pistol Grip Only
Part Number
Range
54-556-350
.080"—1/4"/ 2—6mm
54-556-375
1/4"—3/4"/ 6—20mm
54-556-400
3/4"—4"/ 20—100mm
54-556-480
4"—12"/ 100—300mm
Connectivity Kits
Part Number
54-115-444
54-115-528
54-100-350
Description
RS232 Power Computer Connect Kit
USB Power Computer Connect Kit
CR2032 Battery
Contact the Fowler Technical Department for special anvil applications.
Specifications subject to change without notice.
159
Bore Gages
XTH Holematic Pistol Grip Sets

8. XTD Electronic Holemikes
Bore Gages
The Fowler/Bowers XT Digital Internal Micrometers have been designed to further
simplify the accurate measurement of bores. All XT instruments offer fixed anvils.
Sizes above 1"/25mm offer extended travel. They are available as individual
instruments or in complete sets.
• Large easy-to-read display
• Direct inch/metric conversion
• 3 Preset memories
• Ratchet stop for consistent measurement.
• Resolution: .00005"/.001mm
• RS-232C output and USB connectivity.
• Heads with special anvils available for threads, splines, slots, etc.
• Setting rings included in all sets
• Includes UKAS certificates for micrometer, heads and setting rings.
• Special anvils available.
Sizes over
feature
.500"/12.5mm
bide anvils
tungsten car
and blind bore
t.
measuremen
Electronic Holemike XTD - Individual Sizes (Includes head, handle and ring)
Part Number Range
Accuracy
Depth
2-Point Heads
54-366-003
.080"—.100" (2—2.5mm)
0.00015" (0.004mm)
.350" (9mm)
54-366-004
.100"—.120" (2.5—3mm)
0.00015" (0.004mm)
.350" (9mm)
54-366-005
.120"—.160" (3—4mm)
0.00015" (0.004mm)
.470" (12mm)
54-366-006
.160"—.200" (4—5mm)
0.00015" (0.004mm)
.700" (18mm)
54-366-007
.200"—.250" (5—6mm)
0.00015" (0.004mm)
.700" (18mm)
3-Point Heads
54-366-008
.250"—.312" (6—8mm)
0.00015" (0.004mm)
2.28" (58mm)
54-366-010
.312"—.375" (8—10mm)
0.00015" (0.004mm)
2.28" (58mm)
54-366-012
.375"—.500" (10—12.5mm)
0.00015" (0.004mm)
2.28" (58mm)
54-366-014
.500"—.625" (12.5—16mm)
0.00015" (0.004mm)
2.44" (62mm)
54-366-016
.625"—.750" (16—20mm)
0.00015" (0.004mm)
2.44" (62mm)
54-366-018
.750" —1" (20—25mm)
0.00015" (0.004mm)
2.62" (66mm)
54-366-020
1—1.375" (25—35mm)
0.00015" (0.004mm)
2.62" (66mm)
54-366-022
1.375"—2" (35—50mm)
0.00015" (0.004mm)
3.15" (80mm)
54-366-024
2—2.625" (50—65mm)
0.00020" (0.005mm)
3.15" (80mm)
54-366-026
2.625"—3.250" (65—80mm)
0.00020" (0.005mm)
3.15" (80mm)
54-366-028
3.250"—4" (80—100mm)
0.00020" (0.005mm)
3.94" (100mm)
54-366-030
4—5" (100—125mm)
0.00025" (0.006mm)
4.53" (115mm)
54-366-032
5—6" (125—150mm)
0.00025" (0.006mm)
4.53" (115mm)
54-366-034
6—7" (150—175mm)
0.00030" (0.007mm)
4.53" (115mm)
54-366-036
7—8" (175—200mm)
0.00030" (0.007mm)
4.53" (115mm)
54-366-037
8—9" (200—225mm)
0.00030" (0.008mm)
4.65" (118mm)
54-366-038
9—10" (225—250mm)
0.00030" (0.008mm)
4.65" (118mm)
54-366-039
10—11" (250—275mm)
0.00035" (0.009mm)
4.65" (118mm)
54-366-040
11—12" (275—300mm)
0.00035" (0.009mm)
4.65" (118mm)
Contact the Fowler Technical Department for special anvil applications.
160
F O W L E R H I G H P R E C I S I O N • 1 - 8 0 0 - 7 8 8 - 2 3 5 3 • w w w. f v f o w l e r. c o m

9. Electronic Holemike XTD Complete Range Sets
Part Number
Range
54-364-000
.080"—.250" (2—6mm)
54-364-010
.250"—.375" (6—10mm)
54-364-020
.375"—.750" (10—20mm)
54-364-050
.750"—2" (20—50mm)
54-364-100
2"—4" (50—100mm)
54-364-105
4"—6" (100—150mm)
54-364-110
6"—8" (150—200mm)
54-364-200
4"—8" (100—200mm)
Set Includes
5 heads, 1 handle, 3 rings
2 heads, 1 handle, 1 ring
3 heads, 1 handle, 2 rings
3 heads, 1 handle, 2 rings
3 heads, 1 handle, 2 rings
2 heads, 1 handle, 1 ring
2 heads, 1 handle, 1 ring
4 heads, 1 handle, 2 rings
Holematic XTD Holemike Handle Only
Part Number
Range
54-364-556
.080"—1/4"/2-6mm
54-364-550
.1/4"—3/8"/6-10mm
54-364-551
3/8"—3/4"/10-20mm
54-364-552
3/4"—2"/20-50mm
54-364-553
2"—4"/50-100mm
54-364-554
4"—8"/100-200mm
54-364-557
8"—12"/200-300mm
Connectivity Kits
Part Number
54-115-444
54-115-528
54-100-350
Description
RS232 Power Computer Connect Kit
USB Power Computer Connect Kit
CR2032 Battery
Specifications subject to change without notice.
161
Bore Gages
XTD Electronic Holemike Sets

10. XTA Holemikes
ge capacity
Extended ran
ging anvils!
without chan
Bore Gages
on, same
Basic functi
the
accuracy as
electronic.
The Fowler/Bowers range of mechanical two and three point bore micrometers are now
available as XTA extended travel versions between .080"/2mm and 12"/300mm. This allows
wide measurement range without the need to interchange anvils.
Features:
• Graduations 0.00025" (0.005mm)
• 3-pt contact with tungsten carbide measuring anvils
above .5" (12.5mm)
• Blind bore measuring above .5" (12.5mm)
• Ratchet stop for consistent measuring
• Extensions available for deep measuring
• Setting rings included in all sets
• Includes UKAS certificates.
• Every gage is individually serialized.
• Each range includes handle, head and ring.
162
F O W L E R H I G H P R E C I S I O N • 1 - 8 0 0 - 7 8 8 - 2 3 5 3 • w w w. f v f o w l e r. c o m

11. cy, more
Same accura
economical.
Holemike XTA inch series - Includes handle, head & ring
Measuring
Ring
Part Number Range
Grads.
Accuracy
Depth
Included
2-Point Heads
52-255-305
.080"—.100"
.0005"
.00015"
.350"
.100"
52-255-306
.100"­ .120"
—
.0005"
.00015"
.350"
.100"
52-255-307
.120"­ .160"
—
.0005"
.00015"
.470"
.160"
52-255-308
.160"­ .200"
—
.0005"
.00015"
.700"
.160"
52-255-309
.200"—.250"
.0005"
.00015"
.700"
.200"
3-Point Heads
52-255-310
.250"—.312"
.00025"
.00015"
2.28"
.312"
52-255-311
.312"—.375"
.00025"
.00015"
2.28"
.312"
52-255-312
.375"—.500"
.00025"
.00015"
2.28"
.5"
52-255-313
.500"—.625"
.00025"
.00015"
2.44"
.5"
52-255-314
.625"—.750"
.00025"
.00015"
2.44"
.75"
52-255-315
.750"—1"
.00025"
.00015"
2.60"
.75"
52-255-316
1—1.375"
.00025"
.00015"
2.60"
1.375"
52-255-317
1.375"—2"
.00025"
.00015"
3.15"
1.375"
52-255-318
2—2.625"
.00025"
.00020"
3.15"
2.625"
52-255-319
2.625"—3.250" .00025"
.00020"
3.15"
2.625"
52-255-320
3.250"—4"
.00025"
.00020"
3.94"
3.25"
52-255-321
4—5"
.00025"
.00025"
4.53"
5.0"
52-255-322
5—6"
.00025"
.00025"
4.53"
5.0"
52-255-323
6—7"
.00025"
.00030"
4.53"
7.0"
52-255-324
7—8"
.00025"
.00030"
4.53"
7.0"
52-255-325
8—9"
.00025"
.00030"
4.65"
9.0"
52-255-326
9—10"
.00025"
.00030"
4.65"
9.0"
52-255-327
10—11"
.00025"
.00035"
4.65"
11.0"
52-255-328
11—12"
.00025"
.00035"
4.65"
11.0"
Holemike XTA metric series - Includes handle, head & ring
Part Number Range
Grads.
Accuracy
2-Point Heads
52-255-405
2—2.5mm
.001mm
.004mm
52-255-406
2.5—3mm
.001mm
.004mm
52-255-407
3—4mm
.001mm
.004mm
52-255-408
4—5mm
.001mm
.004mm
52-255-409
5—6mm
.001mm
.004mm
3-Point Heads
52-255-410
6—8mm
.005mm
.004mm
52-255-411
8—10mm
.005mm
.004mm
52-255-412
10—12.5mm
.005mm
.004mm
52-255-413
12.5—16mm
.005mm
.004mm
52-255-414
16—20mm
.005mm
.004mm
52-255-415
20—25mm
.005mm
.004mm
52-255-416
25—35mm
.005mm
.004mm
52-255-417
35—50mm
.005mm
.004mm
52-255-418
50—65mm
.005mm
.005mm
52-255-419
65—80mm
.005mm
.005mm
52-255-420
80—100mm
.005mm
.005mm
52-255-421
100—125mm
.005mm
.006mm
52-255-422
125—150mm
.005mm
.006mm
52-255-423
150—175mm
.005mm
.007mm
52-255-424
175—200mm
.005mm
.007mm
52-255-425
200—225mm
.005mm
.008mm
52-255-426
225—250mm
.005mm
.009mm
52-255-427
250—275mm
.005mm
.009mm
52-255-428
275—300mm
.005mm
.009mm
Specifications subject to change without notice.
Measuring Ring
Depth
Included
9mm
9mm
12mm
18mm
18mm
2.5mm
2.5mm
4mm
4mm
5mm
58mm
58mm
58mm
62mm
62mm
66mm
66mm
80mm
80mm
80mm
100mm
115mm
115mm
115mm
115mm
118mm
118mm
118mm
118mm
8mm
8mm
12.5mm
12.5mm
20mm
20mm
35mm
35mm
65mm
65mm
80mm
125mm
125mm
175mm
175mm
225mm
225mm
275mm
275mm
163
Bore Gages
XTA Analog Holemikes

12. XT Holemike Sets
Bore Gages
The Fowler-Bowers XT Analog Bore
Gages offer an economical solution to
accurate shop floor bore measurement.
Fast, accurate and easy-to-use, the wide
application range of the XT Analog Bore
Gage line may be purchased individually
or in sets.
Holemike XT Large Complete Range Inch Sets
Part Number
Range
52-255-365
.080"—.120"
52-255-465
.120"—.250"
52-255-565
.250"—.375"
52-255-665
.375"—.750"
52-255-775
.750"—2"
52-255-885
2—4"
52-255-890
4—6"
52-255-900
6—8"
Holemike XT Complete Range Metric Sets
Part Number
Range
52-255-368
2—3mm
52-255-468
3—6mm
52-255-568
6—10mm
52-255-668
10—20mm
52-255-768
20—50mm
52-255-868
50—100mm
52-255-898
100—150mm
52-255-968
150—200mm
164
Includes
2 heads, 2 handles, 1 ring
3 heads, 3 handles, 2 rings
2 heads, 2 handles, 1 ring
3 heads, 3 handles, 2 rings
3 heads, 3 handles, 2 rings
3 heads, 3 handles, 2 rings
2 heads, 2 handles, 1 ring
2 heads, 2 handles, 1 ring
for
Kits available
s
popular range
Includes
2 heads, 2 handles, 1 ring
3 heads, 3 handles, 2 rings
2 heads, 2 handles, 1 ring
3 heads, 3 handles, 2 rings
3 heads, 3 handles, 2 rings
3 heads, 3 handles, 2 rings
3 heads, 3 handles, 1 ring
2 heads, 2 handles, 1 ring
F O W L E R H I G H P R E C I S I O N • 1 - 8 0 0 - 7 8 8 - 2 3 5 3 • w w w. f v f o w l e r. c o m

13. XT Series Components and Accessories
XT Setting Rings: X Class
Size
.100"
.160"
.200"
.312"
.500"
.750"
1.375"
2.625"
3.250"
5"
7"
9"
11"
XT Extensions
Part Number
54-336-301
54-336-302
54-336-303
54-336-304
54-336-305
54-336-306
54-336-307
Length
2.5" (63mm)
3" (76mm)
4" (100mm)
6" (150mm)
6" (150mm)
20" (500mm)
40" (1000mm)
Replacement Heads
with Standard Anvils
Standard Anvils
Spherical Anvils
Part No.
54-342-006
54-342-007
54-342-008
54-342-009
54-342-010
54-342-011
54-342-012
54-342-013
54-342-014
54-342-015
54-342-016
54-342-017
54-342-018
54-342-019
54-342-020
54-342-021
54-342-022
54-342-023
54-342-024
54-342-025
54-342-026
54-342-027
54-342-028
54-342-029
Size
.080"—.100" (2-2.5mm)
.100"—.120" (2.5-3mm)
.120"—.160" (3-4mm)
.160"—.200" (4-5mm)
.200"—.250" (5-6mm)
1/4—5/16" (6-8mm)
5/16—3/8" (8-10mm)
3/8—1/2" (10-12.5mm)
1/2—5/8" (12.5-16mm)
5/8—3/4" (16-20mm)
3/4—1" (20-25mm)
1—1-3/8" (25-35mm)
1-3/8—2" (35-50mm)
2—2-5/8" (50-65mm)
2-5/8—3-1/4" (65-80mm)
3-1/4—4" (80-100mm)
4—5" (100-125mm)
5—6" (125-150mm)
6—7" (150-175mm)
7—8" (175-200mm)
8—9" (200-225mm)
9—10" (225-250mm)
10—11" (250-275mm)
11—12" (275-300mm
Diameter
.23"
.366"
.479"
.740"
.924"
.757"
1.365"
Fits Heads
.250"—.375" (6—10mm)
.375"—.500" (10—12.5mm)
.500"—.750" (12.5—20mm)
.750"—2" (20—50mm)
2" and up (50mm and up)
.750" and higher
1.375" and higher
Replacement Heads
with Spherical Anvils
Part No.
54-343-006
54-343-007
54-343-008
54-343-009
54-343-010
54-343-011
54-343-012
54-343-013
54-343-014
54-343-015
54-343-016
54-343-017
54-343-018
54-343-019
54-343-020
54-343-021
54-343-022
54-343-023
54-343-024
54-343-025
54-343-026
54-343-027
54-343-028
54-343-029
Size
.080"—.100" (2-2.5mm)
.100"—.120" (2.5-3mm)
.120"—.160" (3-4mm)
.160"—.200" (4-5mm)
.200"—.250" (5-6mm)
1/4—5/16" (6-8mm)
5/16—3/8" (8-10mm)
3/8—1/2" (10-12.5mm)
1/2—5/8" (12.5-16mm)
5/8—3/4" (16-20mm)
3/4—1" (20-25mm)
1—1-3/8" (25-35mm)
1-3/8—2" (35-50mm)
2—2-5/8" (50-65mm)
2-5/8—3-1/4" (65-80mm)
3-1/4—4" (80-100mm)
4—5" (100-125mm)
5—6" (125-150mm)
6—7" (150-175mm)
7—8" (175-200mm)
8—9" (200-225mm)
9—10" (225-250mm)
10—11" (250-275mm)
11—12" (275-300mm
Contact the Fowler Technical Department for special anvil applications.
Specifications subject to change without notice.
165
Bore Gages
or deep
Extensions f
ions
bore applicat
Part Number
54-332-004
54-332-005
54-332-006
54-332-007
54-332-008
54-332-009
54-332-010
54-332-012
54-332-013
54-332-014
54-332-015
54-332-016
54-332-017

14. XTL Lever Bore Gage System
The Fowler-Bowers XTL Lever Bore Gage Handle features
a fast action and comfortable grip for applications where a
vertical grip is necessary.
Bore Gages
Special Features:
• For use with XT heads.
• Measuring range: 6-100mm (diameters above 100 on request.)
• Excellent for vertical bore measurement
• Simple 2-button operation
• 3 preset memories
• RS-232 output and USB connectivity
• Constant measuring pressure
• Fast, accurate measurement
• Resolution: 0.001mm (0.00005")
• Extensions available for deep hole measurement
Bowers XTL Lever Bore Gage - Handles with Indicator
Part Number
Range
Resolution
54-466-350
.250"-.375"/6-10mm
.00005"/.001mm
54-466-375
.375"-.750"/10-20mm
.00005"/.001mm
54-466-400
.750"-4"/20-100mm
.00005"/.001mm
Heads for XTL Lever Handle
Part Number
Size
54-342-011
1/4—5/16" (6-8mm)
54-342-012
5/16—3/8" (8-10mm)
54-342-013
3/8—1/2" (10-12.5mm)
54-342-014
1/2—5/8" (12.5-16mm)
54-342-015
5/8—3/4" (16-20mm)
54-342-016
3/4—1" (20-25mm)
54-342-017
1—1-3/8" (25-35mm)
54-342-018
1-3/8—2" (35-50mm)
54-342-019
2—2-5/8" (50-65mm)
54-342-020
2-5/8—3-1/4" (65-80mm)
54-342-021
3-1/4—4" (80-100mm)
(Head shown is not included)
Electronic Holemike
XT Setting Rings
Part Number
Size
54-332-007
.312"
54-332-008
.500"
54-332-009
.750"
54-332-010
1.375"
54-332-012
2.625"
54-332-013
3.250"
Contact the Fowler Technical Department for special anvil applications.
166
F O W L E R H I G H P R E C I S I O N • 1 - 8 0 0 - 7 8 8 - 2 3 5 3 • w w w. f v f o w l e r. c o m

15. 0mm" Range
300mm - 50
nt
r measureme
arge diamete
L
contact
with 3-point
The Bowers XT500 large diameter 3-point bore gage has been designed specifically for
the measurement of internal diameters between 300mm (11.811") and 500mm (19.685").
The newly designed constant-force digital readout ensures that the measuring pressure
remains constant throughout the measurement while radiussed measuring anvils
provide optimum centralization in the part. Anvil sets are supplied in 25mm" steps and
each set has been manufactured to the exact toleranced size. The 300mm"-500mm"
anvils are the master reference set and are used for setting the gage in the setting ring.
The other anvil sets are then fitted as required without further re-setting. This means
that only one 300mm setting ring is required to set the gage for all diameters in the full
300mm to 500mm range of the instrument.
Features:
• Measuring range: 300mm/11.811" to 500mm/19.685"
• New constant-force digital readout
• Single 300mm setting ring covers full range
• Radiussed anvils of tool-steel for optimum centering
• Accuracy: ±15µm
• Repeatability: 3µm
• IP65 electronics
• RS-232 output and USB connectivity
• Resolution: .0005"/.00005" (0.01/0.001mm). Metric/Inch switchable
• Fast accurate measurement
• Extensions available for deeper bores (max depth 2.5m)
• UKAS certificate with setting ring
• Certificate of conformity with bore gage
• Supplied in fitted case
Specifications subject to change without notice.
167
Bore Gages
XT-500 Large Diameter Bore Gage

16. XT-500 Large Diameter Bore Gage cont.
XT500 Gage- Individual Instruments
(Supplied with digital display handle, measuring head with anvils and setting ring with UKAS certificate.)
Measuring Ring
Part No.
Range
Accuracy
Depth
Included
54-370-101 11.811"- 12.795"/300-325mm .0006"/15µm 4.724"/120mm 11.811"/300mm
54-370-102 12.795"-13.770"/325-350mm .0006"/15µm 4.724"/120mm 11.811"/300mm
54-370-103 13.799"-14.764"/350-375mm .0006"/15µm 4.724"/120mm 11.811"/300mm
54-370-104 14.764"-15.748"/375-400mm .0006"/15µm 4.724"/120mm 11.811"/300mm
54-370-105 15.748"-16.732"/400-425mm .0006"/15µm 4.724"/120mm 11.811"/300mm
54-370-106 16.732"-17.716"/425-450mm .0006"/15µm 4.724"/120mm 11.811"/300mm
54-370-107 17.716"-18.701"/450-475mm .0006"/15µm 4.724"/120mm 11.811"/300mm
54-370-108 18.701"-19.685"/475-500mm .0006"/15µm 4.724"/120mm 11.811"/300mm
XT500 Gage- Sets
(Supplied with digital display handle, measuring head with
exchangeable anvils and setting ring with UKAS certificate).
Bore Gages
Measuring Ring
Part No. Range
Accuracy
Depth
Included
54-370-201 11.811"-15.748"/300-400mm .0006"/15µm
4.724"/120mm 11.811"/300mm
54-370-202 15.748"-19.685"/400-500mm .0006"/15µm
4.724"/120mm 11.811"/300mm
54-370-203 11.811"-19.685"/300-500mm .0006"/15µm
4.724"/120mm 11.811"/300mm
XT500 Gage- head only
Measuring
Part No.
Range
Accuracy
Depth
54-370-301
11.811"- 12.795"/300-325mm
.0006"/15µm
4.724"/120mm
54-370-302
12.795-13.770/325-350mm
.0006/15µm
4.724/120mm
54-370-303
13.799-14.764/350-375mm
.0006/15µm
4.724/120mm
54-370-304
14.764-15.748/375-400mm
.0006/15µm
4.724/120mm
54-370-305
15.748-16.732/400-425mm
.0006/15µm
4.724/120mm
54-370-306
16.732-17.716/425-450mm
.0006/15µm
4.724/120mm
54-370-307
17.716-18.701/450-475mm
.0006/15µm
4.724/120mm
54-370-308
18.701-19.685/475-500mm
.0006/15µm
4.724/120mm
XT500 Gage- Setting Ring: X Class
Part No.
Range
54-370-401
11.811/300
XT500 Gage-Handle
Part No.
Description
54-370-501
XTDU500M XTD 500 Controller
XT500 Gage- Extensions
Part No.
Range
54-336-305
6/150mm
54-336-306
20/500mm
54-336-307
40/1000mm
168
Connectivity Kits
Part No.
Description
54-115-444
RS232 Power Computer Connect Kit
54-115-528
USB Power Computer Connect Kit
F O W L E R H I G H P R E C I S I O N • 1 - 8 0 0 - 7 8 8 - 2 3 5 3 • w w w. f v f o w l e r. c o m

17. MicroGage 2-Point bore gaging system for 1-6mm
meter
For small dia
t from
measuremen
0
.037 to .25
)
(1.0 to 6mm
reading
with direct
Features:
• System range : .040-.250/1 – 6mm
• New slimline digital display
• Switchable resolution 0.01/0.001/0.0005mm
• Simple 2-button operation
• Data output : RS232 / USB proximity sensor
• Linearity : Diameter 1.0 - 1.5 max 2% of measuring travel, min 0.001 mm.
Diameter 1.5 - 6 max 1% of measuring travel, min 0.001mm
• Repeatability : 0.001mm
• Available as individual instruments or sets.
• UKAS-certificates as standard with all setting rings
• Hard-chromed ball-contacts
MicroGage with Depth Stop
Part Number
54-551-001
54-551-002
54-551-003
54-551-004
Sets:
54-551-010
54-551-011
54-551-012
Range
.037 - .061/0.95 - 1.55mm
.060 - .096/1.50 - 2.45mm
.089 - .167/2.25 - 4.25mm
.144 - .250/3.65 - 6.35mm
Depth Stop Part Number
54-551-501
54-551-502
54-551-503
54-551-504
.037 - .096/0.95 - 2.45mm
.060 - .167/1.50 - 4.25mm
.089 - .250/2.25 - 6.35mm
Rings: Grade N (nominal)
Part Number
Size
54-551-400
1.00mm
54-551-401
1.10mm
54-551-402
1.20mm
54-551-403
1.30mm
54-551-404
1.40mm
54-551-405 1.75mm
54-551-406
2.00mm
54-551-407
2.25mm
54-551-408
2.50mm
54-551-409
2.75mm
Part Number
54-551-410
54-551-411
54-551-412
54-551-413
54-551-414
54-551-415
54-551-416
54-551-417
54-551-418
Specifications subject to change without notice.
Size
3.00mm
3.25mm
3.50mm
3.75mm
4.00mm
4.50mm
5.00mm
5.50mm
6.00mm
169
Bore Gages
The new Fowler-Bowers MicroGage 2-point bore gaging system has been designed
specifically for the measurement of small bores between 1.0 - 6.0 mm. The measuring
heads are equipped with spherical, split-ball, hard-chromed contact points and are set in
appropriate setting rings. The MicroGage system is available as individual instruments or
as full sets. All setting rings are supplied as standard with UKAS certification.

18. Pneumatic Deep-Hole Bore Gaging System
Bore Gages
ep bore
Accurate de
ts - both
measuremen
horizontal
vertical and
Designed specifically for the measurement of bore diameters from 2 to 12/50mm310mm up to 50'/15 meters deep, the Bowers Pneumatic Deep-Hole Bore Gaging
System provides an accurate, robust and easy-to-use solution to what would otherwise be a complex measuring task. The equipment consists of a 3-point bore gaging
head with spherical anvils made of tungsten carbide and a variable number of 1m
extensions screwed together to achieve the required depth. The spherical contact
anvil helps alignment in the bore while the carbide material promotes extremely long
service life. Just behind the measuring anvils, an acetyl guide sleeve is fitted to the
head to enable it to be pushed smoothly down to measurement depth without damaging either the anvils or the bore itself. The measuring head is operated by a pneumatic
actuator powered by a 6 bar compressed air supply - either from a compressor or a
workshop air-line. The measurement data is collected by a capacitive probe fitted just
behind, and in constant contact with the measuring head. This direct contact ensures
high-quality transducer-type accuracy, even at great depths. Measurements are taken
by pressing a footswitch connected to the airline. The measurement is then shown on
the digital readout at the operator end.
Various readouts are available, all have an RS232 output for data-transmission to a PC.
Applications range from oil industry, extrusion machines to military cannon, to name a few.
Ideal for deep bore applications in general.
Features:
• Measures diameters from 2 to 12/50-310mm, up to 50'/15 meters deep
• 2 point and 3 point heads available
• Accuracy: ±.0002/±.005mm (subject to bore condition)
• Quick set-up time
• Easy to use
• Not adversely affected by temperature fluctuation
• Robust design
Cross section view.
Contact the Fowler Technical Department for more information.
170
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19. Bowers Special Applications
Plan View
Heads available in all XT Styles and Ultima System
2 Point Special Measuring Heads
Groove Measuring Heads
Application View
• Available as 2 point head.
• Various anvil forms available.
• Diameters from 1/4­ 12/6-300mm.
• XT extended range for tight entry size vs.
groove size.
Sample Profile
Plan View
Thread Measuring Heads
Application View
Bore Gages
• Available as 2 or 3 point head.
• Any thread form can be made: Ansi, ISO,
Whitworth, ACME, JIS, Buttress and Pipe.
• Various anvil forms available.
• Diameters from M4-300mm and 8 UN-12”
diameter.
Sample Profile
Plan View
Special Length - Small Diameter
•
•
•
•
•
•
Application View
Can be supplied in diameters from 2 – 6mm.
Not available in 3 point.
Depth dependent on diameter.
Split cylinder or split ball form.
Spherical contacts available.
Excellent for small - deep bore applications.
Shallow Bore
Contact the Fowler Technical Department for special head applications.
Specifications subject to change without notice.
171

20. Bowers Special Applications
2 and 3 Point Special Measuring Heads
Spherical Radius
Sample Profile
Application View
front
Plan View
• Can be supplied as a 2 point for ovality
or 3 point contact.
• Available from 1/4-12/6-300mm.
• Spherical anvil radius provides repetitive
measurements in deep bore and large
bore measuring.
• No need to rock the anvils for TDC
size or measuring within 12 degrees off
center.
side
Bore Gages
Groove measuring heads
• Available as 2 or 3 point head.
• Various anvil forms available.
• Nearly any shape or size can be
accommodated
• Diameters from .080-12/2-300mm.
• XT extended range for tight entry
size vs groove size.
Oil Seal
‘O’ Ring
Ball Race
We can produce
any special groove
anvil form per your
requirements!
Annular
Special Forms
Contact the Fowler Technical Department for special head applications.
172
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21. Bowers Special Applications
Splines (odd and even number of teeth)
Application View
2
and 3 point Internal Spline heads
2 and 3 point heads machined to suit particular spline. Pitch,
Major and Minor diameter heads fitted with 1 piece formed
anvils.
Sizes available from 5/16-12/8-300mm diameter.
3 Point anvil position
Particularly suited for measuring all types of internal
splines. We can supply odd or even tooth, raked,
offset, angled and vertical splines. We can supply
heads in 2 and 3 point configuration, with ball style
or pin style anvils. Specialty tapered spline heads,
used in the automotive and aircraft industries can
also be supplied.
API gaging and other oil industry specific gages can
also be supplied upon request.
Plan View
2 Point anvil position
Major Diameter
Screw Thread Measuring Heads
Minor Diameter
Bore Gages
Pitch Diameter
Application View
Internal Thread
• To measure effective (functional) diameter, pitch
diameter, major diameter, between M4-300mm and 8
UN-12” diameter.
• Available for the following types of thread form: UN
(UNF, UNC, UNJ, UNS) Metric, Acme, Whitworth,
Buttress, BSP, BA, BSF, PG, Standard Pitches, LH.
• Other forms and sizes also available upon request.
Left Hand
Right Hand
Multistart
Buttress
Ball Screw
Acme
Contact the Fowler Technical Department
for special head applications.
Specifications subject to change without notice.
173

22. Bowers Special Applications
Application View
Taper
Plan View
• Set using distance ‘d’ between two heads.
• Point contact on bore using carbide balls.
• 3 point also available.
d
Bore Gages
3 Point Spherical
Application View
Plan View
• Gives good repeatability even
when out of line with bore center.
Available from
.250-12/6-300mm diameter on
digital systems.
• The spherical anvil gives the gage
operator chance to be off axial
center by up to 15 degrees, and
still have a correct reading on the
display
• Normally used with a stop collar
or depth stop device, the spherical
anvils also allow minimum contact
between the gage and workpiece.
Deep Hole Gaging
For diameters from 3/4/20 mm to 8/200mm, depths
20/500mm to 15m. Deep bore gages are used in everything
from oil well drill applications, large bore gun barrel
measurement and nuclear fuel rods.
Application View
Can be fitted with spacers to
allow segments to be measured
throughout the depth of the bore.
Contact the Fowler Technical Department for special head applications.
174
F O W L E R H I G H P R E C I S I O N • 1 - 8 0 0 - 7 8 8 - 2 3 5 3 • w w w. f v f o w l e r. c o m
d

23. Smart Plug System
accurate and
Consistent,
that are
robust gages
n
h productio
ideal for hig
applications
Smart Plugs offer a fast, robust, and easy-touse measurement option, offering superb accuracy and repeatability to less than 0.00005.
The reliable 2-point measuring system is
designed to withstand harsh manufacturing
floor environments. Smart plugs are manufactured to specific diameters and offer short
measurement ranges (around 0.007). This
dedicated design is a great fit for high-volume
manufacturing and quality control.
Special Features:
• Tough, robust construction
• Easy-to-use
• Long life
• High accuracy
• Flexible, modular
• Hand-held measurement.
• Cost-effective
• High visibility displays
• Protective indicator shroud (with some indicators)
• All setting rings supplied as standard with UKAS calibration certificates.
• Coverplates as standard on all Smart Plugs, for protection of gage head.
Smart Plugs are dedicated to one specific size. Range descriptions
below are for pricing information only.
Part Number
Description
Chrome Plugs with Carbide Contact Points (2 pt.)
*SPECIFY EXACT SIZE TOLERANCE AT ORDERING TIME.
54-556-010
0.236-0.787 (6-20mm)
54-556-012
0.590-0.984 (15-25mm)
54-556-014
0.984-1.378 (25-35mm)
54-556-016
1.378-1.772 (35-45mm)
54-556-018
1.772-2.362 (45-60mm)
54-556-020
2.362-3.150 (60-80mm)
54-556-022
3.150-3.937 (80-100mm)
54-556-024
3.937-4.921 (100-125mm)
54-556-026
4.921-5.906 (125-150mm)
54-556-028
5.906-6.890 (150-175mm)
54-556-030
6.890-7.874 (175-200mm)
54-556-032
7.874-8.858 (200-225mm)
54-556-034
8.858-9.843 (225-250mm)
54-556-036
9.843-11.025 (250-280mm)
Rings
Part Number Size
54-556-801
1.5—2mm
54-556-802
2—3mm
54-556-803
3—4mm
54-556-804
4—5mm
54-556-805
5—6mm
54-556-806
6—10mm
54-556-807
10—20mm
54-556-808
20—25mm
54-556-809
25—30mm
54-556-810
30—40mm
54-556-811
40—50mm
54-556-812
50—60mm
54-556-813
60—70mm
54-556-814
70—80mm
*SPECIFY EXACT SIZE RING
Rings
Part Number
54-556-815
54-556-816
54-556-817
54-556-818
54-556-819
54-556-820
54-556-821
54-556-822
54-556-823
54-556-824
54-556-825
54-556-826
54-556-827
54-556-828
Size
80—90mm
90—100mm
100—115mm
115—130mm
130—145mm
145—160mm
160—170mm
170—180mm
180—190mm
190—200mm
200—210mm
210—220mm
220—230mm
230—240mm
Specifications subject to change without notice.
Thread
M6x0.75
M10x1
M10x1
M10x1
M10x1
M10x1
M10x1
M10x1
M10x1
M10x1
M10x1
M10x1
M10x1
M10x1
Rings
Part Number
54-556-829
54-556-830
54-556-831
54-556-832
54-556-833
54-556-834
Size
240—250mm
250—260mm
260—270mm
270—280mm
280—290mm
290—300mm
175
Bore Gages
Smart Plugs

24. Type C
Indicators Heads
Type D
Type A
Type B
Bore Gages
Handles
Plugs
Rings
Indicator Heads
Part No.
Description
Thread
Heads (require handle)
54-556-108 Handle for 8mm stem
M6
54-556-138 Handle for 3/8 stem
M6
54-556-117 Handle for 8mm stem
M10
54-556-118 Handle for 3/8 stem
M10
54-556-622 Type B mechanical dial gage
0.000050 (0.001mm) resolution
54-556-625 Type D Digital indicator
Part No.
Description
Thread
Heads (with built-in handle)
54-556-608 Type A mini-indicator with shroud M6
54-556-708 Type C indicator with shroud
M6
54-556-617 Type A mini-indicator with shroud M10
54-556-719 Type C indicator with shroud
M10
Extensions
54-556-104
54-556-110
100mm extension
100mm extension
M6
M10
Contact the Fowler Technical Department for more application concepts and accessories.
176
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25. Carbon Fiber Beam Gage
for large diameter applications
(Indicator shown not included.)
Set the gage to a master and then transport the lightweight gage to the part for easy
measurement of large turning applications. Special tooling for setting on Fowler/Trimos
horizontal gages is available.
Bore Gages
eight gage
This light-w
erson
allows one p
large
to measure
. and O.D.
diameter I.D
ts up to
measuremen
)
80(standard
The Carbon Fiber Beam Gage is a reliable way to measure large dimensions
accurately and easily. Due to the material of carbon fiber an 80 diameter is a
one-man operation.
250mm, 500mm and 1000mm extensions available. Custom lengths and depths available.
Bowers design and quality gives you the assurance of accuracy and repeatability on
every application.
Features:
• ID/OD measurement
• 0-1925mm external range
• 257-2155mm internal range
• Carbon fiber material for easy and accurate measurements.
• Tooling ball anvils available for ball race measurement.
Part Number
54-466-660
54-466-661
54-466-662
54-466-663
54-466-664
Description
Carbon fiber beam gage
1 meter extension
Threaded anvils
Presetter
Gage ball anvils
Contact the Fowler Technical Department
for more information.
Specifications subject to change without notice.
177

26. INTEX Comparator Beam Gage
Developed to measure both internal and external diameters and lengths, the Intex
gage's aluminium extrusion beam gives it a rigid yet lightweight quality, making it ideal
for shop-floor environments. The simple release of a locking thumbscrew enables the
gages measuring direction to be changed quickly and easily.
Bore Gages
tended range
Great for ex
external
internal and
eters.
shallow diam
up to 40/1000mm range
Features:
• Lightweight and rigid
• Sizes over 40/1000mm available on request
• Internal and external measurement
• .080/2mm travel on moving contacts
• Adjustable fixed contacts with up to 10/250mm adjustment range
• Digital or analog indicator available
• Hardened steel wear pads locate gage onto component aiding repeatability
and prolonging service life.
• Setting master required to set the instrument.
• Shown with electronic indicator may also be used with mechanical indicators.
Intex Gauge
Part Number
54-466-001
54-466-002
54-466-003
54-466-004
54-466-101
Description
INTEX Beam Gage (without indicator)
INTEX Beam Gage (without indicator)
INTEX Beam Gage (without indicator)
INTEX Beam Gage (without indicator)
10mm Spherical Disc Probes
Range
7.824-15.748/200-400mm
15.748-23.622/400-600mm
23.622-31.496/600-800mm
31.496-39.370/800-1000mm
Compatible Indicators
Part Number
Description
54-530-135
Sylvac Mark VI Ultra Digit Indicator
52-540-000
Dial Indicator .0001 Resolution, 0-50-0 Reading
178
Range
0-.500/0-12.5mm
.200
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27. Basic Universal Gage
Features:
• Internal and external measurement.
• Extremely large measuring range:
0-118/0-3000mm
• Constant measuring pressure.
• Digital readout.
• Large range of accessories.*
• Anvil travel of .590 (15mm).
Sylvac Electronic Features:
• Min/Max/TIR modes
• .0005/.00005 (.01/.001mm) resolution
• Direct RS232 output
• Tolerance indication
• Rotating display
• Two presets
part number 54-265-700
Part Number
Description
54-265-700
Universal Gage with Digital Readout.
Internal range: 1.18—10 (30—250mm)
External range: 0—8.4 (0—215mm)
Includes: pair of 2 arms
pair of depth stops
pair of clamping adaptors and contact points
Specifications subject to change without notice.
179
Bore Gages
The Fowler/Bowers Universal Measuring Gage is ideal for the measurement of inside
and outside diameters, threads, slots, recesses, grooves, tapers, etc. The large variety of
accessories are easily and quickly interchanged, allowing measurements of virtually any
type of workpiece.

28. Deluxe Universal Gage
B
A
E
J
G
H
I
ted to
Kit construc
ternal
meet most in
applicaand external
tions
L
C
part number 54-265-777
Bore Gages
Accessories
A.
54-265-045
B.
54-265-048
C.
54-265-049
D.
54-265-055
E.
54-265-047
F.
54-265-015
G.
54-265-030
H.
54-265-040
I.
54-265-043
J.
54-265-020
K.
54-265-010
L.
54-265-041
Pair of Flat Shoulder Anvils
Pair of Internal Disc Anvils (large)
Pair of Internal/External Disc Anvils (small)
Pair of Clamping adaptors
Pair of Cylindrical Shoulder Anvils
Pair of Spherical Tip Contact Points
Pair of Measuring Arms 3(75mm) long
Pair of Measuring Arms 4(100mm) long
Pair of Depth Stops
Pair of Measuring Arms 2(50mm) long
Pair of Flat Contact Points
Pair of Mounting attachments
Part Number
Description
54-265-777
Universal Gage with Digital Readout.
Complete Set.
Internal range: 1.18—10 (30—250mm)
External range: 0—8.4 (0—215mm)
Includes all accessories shown above.
Other Accessories:
54-265-000
Universal Gage Only with Indicator
54-265-200
Universal Gage Only (no indicator)
54-265-090
6 Extension: Increases range of Universal Gage by 6 (150mm)
54-265-100
20 Extension: Increases range of Universal Gage by 20 (500mm)
54-265-023
Bench Stand
54-265-002 Cowl
54-265-119
13mm Cone Anvil
54-265-120
25mm Cone Anvil
54-265-121
50mm Cone Anvil
*Available on special order
Pair of ball inserts for gear/spline measurements. Thread inserts for
internal/external threads. Special anvils such as cones, balls, pins, etc.
Contact our Technical Department for price quotes.
180
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29. UniCal Ultra light internal/external sliding gage
Part Number
54-112-300
54-112-600
54-112-100
Accessories:
54-112-041
Range
0-12/0-300mm
0-24/0-600mm
0-40/0-1000mm
Maximum Error
.0012/30µm
.0016/40µm
.0024/60µm
Bore Gages
for
See page 180
ts and
contact poin
ments
other attach
Features:
• Ranges: 0-300mm. 0-600mm, 0-1000mm
• Preset for internal/external measurement
• Constant measuring force
• Hold feature for post-measurement viewing
• Incremental floating zero
• Inch/metric function
• Resolution: .0005/.01mm
• Min/Max function
• Tolerance indicators
• 5mm Ø mounting bores on the top and underneath the gage.
• Adapters available for Bowers Universal Gage
accessories.
• Wide range of measuring contacts
• Large, easy-to-read LCD display
• RS232 output
• Water resistant
Repeatability
.0008/20µm
.0008/20µm
.0008/20µm
Mounting Adapters
Specifications subject to change without notice.
181

30. Shallow Bore Gage
icators
Accepts ind
d dovetail
with standar
mounts
ator
See the indic
ing 0n
section start
page 87
 Indicator and ring shown here with Shallow Bore Gage are not included in price.
Bore Gages
The Shallow Bore Gage with its large measurement range is
perfect for measuring shallow bores and shoulder diameters.
• Made of hardened tool steel, satin-chrome finish
• Works with most brands of horizontal or vertical test
indicators
• Fine adjustment .400
• Depth capacity .05—.400 *
• Includes two hex keys
• Contact pin hole distance .250
* Based on using test indicator with 1⁄2 long contact point.
Side view.
Part Number
52-547-000
52-547-001
52-547-002
52-547-003
52-547-004
52-547-006
182
Description
Shallow Bore Gage 7 with disc anvil
Shallow Bore Gage 5 with disc anvil
Shallow Bore Gage 12 with disc anvil
10 Extension for 52-547-002
20 Extension for 52-547-002
Carbide ball pin anvil (for 5 7 Gages)
Internal
Range
.55—7.2
.55—5.2
2—12.1
External
Range
.24—6.92
.24—4.92
1.95—12.05
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31. Digital Cylinder Bore Gages
Fowler/Bowers Digital Cylinder Bore Gages are a new
innovation in bore diameter measurement. One gage
covers four different mechanical dial gage options:
.00005/.001mm, .0005/.01mm.
The display can be set to function on either inch or metric
with switchable resolution, depending on the workpiece
tolerance. With programmable preset on “min value”,
once the gage has been set with a single button press
after a sweep of the gage, the component bore size can
be read from the display.
• Displays actual bore diameter or comparative results
(Min memory Hold)
• Inch/metric conversion
• Switchable resolution .00005/.001mm, .0005/.01mm
• Direct RS232 output
• Fast simple checking for bores—size, ovality, taper, etc.
• Lightweight ABS gage shroud for extra strength and
protection
• Tungsten carbide contact points
• Thermally insulated for extra stability
• Robust construction for shop floor use
• 2-point measuring with 3-point centering.
Bore Gages
tomatically
Indicator au
d holds
captures an
meter.
minimum dia
Longer or shorter lengths
are available. Prices quoted
upon request. Contact Fowler
Technical Department.
Part Number
54-549-002
54-549-004
54-549-006
54-549-008
54-549-010
54-115-526
54-115-527
Range
.500—.875 (12.5—22mm)
.875—2 (22—50mm)
2—6 (50—150mm)
6—12 (150—300mm)
6—24 (150—600mm)
USB computer connect kit
RS-232 computer connect kit
Specifications subject to change without notice.
Bore Depth
6 (150mm)
6 (150mm)
10 (250mm)
15 (380mm)
15 (380mm)
183

32. Mechanical Cylinder Bore Gages
Fowler/Bowers Cylinder Bore Gages
have been built on the Bowers'
reputation for quality…a fast, accurate method for checking bores.
Originally designed for engine
rebore use, these bore gages have
since been developed into a universal, wide range, two point internal
measuring system suitable for many
applications.
2 pt.
Conventional
t with
measuremen
ity.
Bowers qual
An improved mechanical system
increases its strength and wear resistance. All contact points are tungsten
carbide. Robust, easy to use and
suitable for most environments and
applications.
Bore Gages
Set the gage with a setting ring or
gage blocks by rotating the dial face to
zero. During measurement, the gage is
inserted into the bore at an angle and
then rocked slowly to enable a reading
to be taken. A spring loaded centralizing foot ensures that the gage remains
on center during measuring operation
when the minimum reading gives the
bore size.
Features:
• Available in inch and metric, ranging
from 1⁄2—24 /12.5mm—600mm.
• Choice of .0001, .0005, .002mm or
.01mm graduations.
• Fast, simple checking of bores for size,
ovality, taper, etc.
• Lightweight housing for extra strength and protection.
• Thermally insulated for extra stability.
• Tungsten carbide contact points.
• Specials available for measurement of deep bores.
• Extensions up to 2 meters available on some models.
Part Number Range
Inch Series:
52-548-002
.500—.875
52-548-012
.500—.875
52-548-004
.875—2
52-548-014
.875—2
52-548-006
2—6
52-548-016
2—6
52-548-008
6—12
52-548-018
6—12
52-548-010
6—24
52-548-020
6—24
Metric Series:
52-548-003
12.5—22mm
52-548-013
12.5—22mm
52-548-005
22—50mm
52-548-015
22—50mm
52-548-007
50—150mm
52-548-017
50—150mm
52-548-009
150—300mm
52-548-019
150—300mm
52-548-011
150—600mm
184
Dial
Reading
Grad.
Bore
Depth
.0005
.0001
.0005
.0001
.0005
.0001
.0005
.0001
.0005
.0001
0—25—0
0—50—0
0—25—0
0—50—0
0—25—0
0—50—0
0—25—0
0—50—0
0—25—0
0—50—0
6
6
6
6
10
10
15
15
15
15
.01mm
.002mm
.01mm
.002mm
.01mm
.002mm
.01mm
.002mm
.01mm
0—50—0
0—10—0
0—50—0
0—10—0
0—50—0
0—10—0
0—50—0
0—50—0
0—50—0
150mm
150mm
150mm
150mm
250mm
250mm
380mm
380mm
380mm
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33. Electronic 1.4 to 6 Dial Bore
Gage Set
Includes FREE
Instructional CD!
All the same benefits included in the X-Tender Dial Bore Gage are now available
with an electronic indicator providing inch/metric reading capability. Preset size of
master for absolute reading and minimum hold feature to lock on the bore size as
the gage is rocked in the part to be measured.
Bore Gages
o most
Industry's tw
gage
popular bore
ined in one
ranges comb
easy-to-use
C set!
ELECTRONI
Bore Gage Features:
• Range: 1.4-6/35mm-150mm
• Carbide anvils
• Easily adjustable
• Self-centering
• Includes 2 contact extension
• Shop hardened case
Instructional video
available at:
youtube.com/FowlerVid
Indicator Features:
• Dual reading inch/metric electronic
indicator.
• Bar graph and numeric digital
display
• Resolution: .00005/.001mm
• Preset with recall
• ABS/INC measurement
• Min/Max/TIR
Part Number
54-646-401
54-100-350
Description
XTender-E Bore Gage Set
CR2032 Battery
Specifications subject to change without notice.
185

34. 1.4 to 6 or 35 to 160mm
Dial Bore Gage Set
o
Industry's tw
r bore
most popula
ombined
gage ranges c
-use
in one easy-to
set!
• Carbide Anvils
• Easy-to-read
• Economical
• Graduation: .0005 or .01mm
• Insulated grip
• 1.4 to 6 range or 35 to 160mm
• 9.5 Depth
• Chrome plated handle.
• Includes 2 contact extension
and fitted case.
Part Number
52-646-400
52-646-500
52-646-220
Description
Inch X-Tender Bore Gage Set
Inch X-Tender Bore Gage Set
Metric X-Tender Bore Gage Set
Graduation
.0005
.0001
.01mm
Bore Gages
2 to 6 Dial Bore Gage
Features No. 52-646-300:
• Range: 2-6
• Carbide anvils
• Graduation: .0005
• 9.5 Depth
• Easily adjustable
• Self-centering
• Insulated grip
• Chrome plated handle.
• Includes 2 contact extension
fitted case.
Part Number
52-646-300
Description
2-6 Bore Gage Set
.7 to 1.5 Dial Bore Gage
Features No. 52-646-100:
• Range: .7-1.5
• Carbide anvils
• Graduation: .0005
• 9.5 Depth
• Easily adjustable
• Self-centering
• Insulated grip
• Chrome plated handle.
• Includes fitted case.
Part Number
52-646-100
186
Description
0.7-1.5 Bore Gage Set
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35. 2 to 6 Right Angle Dial Bore Gage
For measuring difficult-to-reach bores in tight
or inconveniently located spaces on machine
applications.
• Carbide anvils
• Easy-to-read
• Economical
• Range: 2 to 6
• Graduation: .0005
• Chrome plated handle
• Insulated grip
• Includes 2 contact extension
Description
2—6 Dial Bore Gage Set
Bore Gages
Part Number
52-646-250
4 to 12 Bore Gage
• Carbide Anvils
• 4 to 12 range
• 10 measuring depth
• Easy-to-read
• Economical
• Graduation: .0005
• Insulated grip
• Chrome plated handle.
• Includes 2 extensions
Part Number
52-646-600
Description
Xtra-Range Bore Gage
Specifications subject to change without notice.
187